Anyone using Affinity Photo + Topaz Gigapixel AI? Sizing question...

[nickbatz]

I'd like to use Gigapixel AI to sharpen selected areas of a picture I'm working on. (Too many artifacts to use it on the whole thing.) 

So I copy the area I want to process, export it as a TIFF, run it through Gigapixel AI set to 1X... and when I reimport it into Affinity Photo, it's larger and has to be scaled down to match.

Any ideas how to avoid that?

I should add that part of my normal routine is to resize images in Affinity Photo to 300 DPI and resample them very early in the process.

TIA

[DWright]

I got better results when I used the resize ration of 0.95 rather than 1.0 when placed back into Affinity Photo.

[nickbatz]

Thanks very much, will try that.

[John Rostron]

I use PhotoZoom rather than Gigapixel, and I tried what you have been doing using PhotoZoom. It uses splines as part of the resizing process.

The size of the output from PhotoZoom as exactly the same as the input.

John

[HCl]

.

[nickbatz]

8 hours ago, Return said:

Did try this out and it was the same size.
Opened a 300dpi image>made selection>duplicate>export selection to tiff(lanczos NS, compression:none)
Opened in GPAI>used resize to 1 >saved>imported to afpub(photopersona)
Perhaps your document has a different dpi set in comparison to the (placed)image file?

 

Hm. As I said, I resized (and resampled) the document to 300 DPI and exported it without resampling again. This has been consistent with other pictures too.

The only variable I can think of is that I'm an artist rather than a photographer, and I'm using pieces of lots of iPhone images. That shouldn't make a difference, since I paste the fragments in (and resize them to 300 DPI first), but the complexity gives the computer more chances to get confused.